Walmart has no centralized warehouses. Everything is custom-picked at third-party logistic facilities for all the suppliers and trucked directly to the stores.

Walmart has no centralized warehouses. Everything is custom-picked at third-party logistic facilities for all the suppliers and trucked directly to the stores. So let's compare an order made with Amazon and one made at Walmart. The Amazon order is made with pickers standing at a station while robotic carts move stock around them. The Walmart order is made by a worker that walks the retail store gathering items off the shelves alongside customers. I'm guessing Amazon still has an upper hand at this point.